[v2 1/2] drm/i915/display: Add Wa_16030862157 to the display workaround list

[Uma Shankar <uma.shankar@intel.com>]

Register Wa_16030862157 in the display workaround framework so that its
platform applicability lives in one place (__intel_display_wa()) rather
than being open-coded at each use site. The workaround applies to Xe3p
(DISPLAY_VER >= 35).

No functional change: this only adds the enum entry and the matching
case; consumers are wired up in a follow-up change.

Assisted-by: Claude:claude-opus-4-8
Signed-off-by: Uma Shankar <uma.shankar@intel.com>
---
 drivers/gpu/drm/i915/display/intel_display_wa.c | 2 ++
 drivers/gpu/drm/i915/display/intel_display_wa.h | 1 +
 2 files changed, 3 insertions(+)

diff --git a/drivers/gpu/drm/i915/display/intel_display_wa.c b/drivers/gpu/drm/i915/display/intel_display_wa.c
index b4c49816f7eb..d6b036da3992 100644
--- a/drivers/gpu/drm/i915/display/intel_display_wa.c
+++ b/drivers/gpu/drm/i915/display/intel_display_wa.c
@@ -140,6 +140,8 @@ bool __intel_display_wa(struct intel_display *display, enum intel_display_wa wa,
 						STEP_A0, STEP_B0);
 	case INTEL_DISPLAY_WA_16029024088:
 		return DISPLAY_VER(display) >= 35;
+	case INTEL_DISPLAY_WA_16030862157:
+		return DISPLAY_VER(display) >= 35;
 	case INTEL_DISPLAY_WA_18034343758:
 		return DISPLAY_VER(display) == 20 ||
 			(display->platform.pantherlake &&
diff --git a/drivers/gpu/drm/i915/display/intel_display_wa.h b/drivers/gpu/drm/i915/display/intel_display_wa.h
index 92b3980bea84..338b32e4162d 100644
--- a/drivers/gpu/drm/i915/display/intel_display_wa.h
+++ b/drivers/gpu/drm/i915/display/intel_display_wa.h
@@ -54,6 +54,7 @@ enum intel_display_wa {
 	INTEL_DISPLAY_WA_16025573575,
 	INTEL_DISPLAY_WA_16025596647,
 	INTEL_DISPLAY_WA_16029024088,
+	INTEL_DISPLAY_WA_16030862157,
 	INTEL_DISPLAY_WA_18034343758,
 	INTEL_DISPLAY_WA_22010178259,
 	INTEL_DISPLAY_WA_22010947358,
-- 
2.50.1